My baby is premature he was having low sugar and breathing problem when born. his birth weight was 1.5kg after 50 days his weight was 2.3kg. Is the growth normal? I am giving him formula milk and breastfeeding both. formula milk doc said give till he get to 2.5kg it is lbw formula milk. after he get upto 2.5kg which formula milk can I give? plz suggest. doc had given HMF powder sachet but it is not available in any medical and I want to give him only formula milk along with breastfeeding. plz suggest.